Loom shuttle



LOOM SHUTTLE Filed oct. 11, 1924 7 n 2547;@ ./I/Q/m/M mfg.

` mofunftedon said pivotal axis, and

Patented pr. 2l, i925.

GEORGE A. LITGHFIELD, lOF SO'UTHBRJEDGE, MASSACHUSETTS,

Assis-non To Limon- FIELD SHUTTLE COMPANY, OF SOU'THBRIDGE,MASSACHUSETTS, Jl. OORPQRATION OF MASSACHUSETTS.

Application le'd October `11, 1921i.

To all lwhom z'tl nwfg/ concern:`

Be it knovvn that l, Gnonei: A. Li'rori'- FIELD, a citizen of thclUnited States, and resident ot" Worcester and State of Massacln'lsetts,have invented certain new and useful Improvements in Loom Shuttles, ofwhich the tolloxving is a specilication.

This invention relates to loo-m shuttles oi the type carrying a pivotalspindle for operatively supporting 'either a cop tube or a bobbin whichcarries they package of filling yarn in the shuttle.` i

As the spindle is intended to carry either a cop tuber or a bobbin,provision is made for retaining either one ot' these yarn-carryingdevices against longitudinal displacement in the shuttle which theshocks of suddenly starting and' stopping the shuttle tends to produce.As bobbins are invariably larger in diameter at their base portion thanare the cop tubes commonly employed, it has been proposed to use springhooks or lingers secured to the heel end of the spindle head, theshorter and innermost of which extends inwardly to grip the end portionof the cop tube, While the outer and longer arm extends inwardly farenough to engage a circumterei-itial groove in the base of the bobbin.It has also been proposed to use a single as to form twoinwardlyprojecting retaining members, properly located vto grip respectively acop tube or a b'obbin.

The present invention is intended to obviate certain ditlicnlties thatare involved in the use of either ot' the above constructions torretaining cop tubes and bobbins against displacement on the spil-idleblade, the present arrangement being such as to male possible a:stronger tension for resisting lany releasing movement on the part olfveither the cop-retaining member or the bobbin-retaining member, While atthe same time increasing the dura-bility and lessening the likelihoodIof breakage* of these parte which, inl previous constructions,#areunder constant flexing strains tov permit removal oi theV yarn-carrierWhether a cop or bobbin.

To this end the invention comprises, genar pivotal blade mounted on"erally speaking, a transverse pm tormmg a pivotal axisV located in therear part of the shuttle, combined with cop-gripping member pivotally abobbin- Sonthbridge, in the county ol repeated' spring' arm, bent soyLooivt SHUTTLE.

Serial No. 743,059.

engaging spring arm secured to the heel end oi the spindle so that asthe spindle rigid to give 1t any desired degree of strength, While whenthe spindle is opened the pivotal member is so hel-d as to engage, atits foi-Ward end, the forward end portion oi the spring arm, cause thesaine to yield and permit the spindle to continue its swinging movementto open position With the least possible strain on the spring-arm: byreason of the relatively long leverage from its rear end to thepoin-toil contact Withits' special member, namely, the pivotalcopgripping member.

These and yother features of the inwention: will be explained in thefollowing specitiy cation and Will be defined in the claims' heretoannexed.

ln the accompanying' drawings I have illustrated a simple constructionand arangement embodyingthe principles of this invention, inr Which:

Figure l is a vertical central section through the rear end' porti-on ofashuttle having a blade for the reception oi' either cop or bobbin withthe part-s in normal position for Weaving.

lligiflre 2 is a central vertical section show'- ing the same parts withthe spindle in open` position, that is, swung out ot the shuttle body topermit removal of the yarn-carrier and application oiE a lull cop-tubeor bobbin.

Figure 3 is a detail the spindle and its cooperatingl retaining membersWith theout-line oi a bobbin shown in dotted lines.

In the practice of this invention, as' illustrated in the drawings, theshuttle body, which is of usual or suitable construction, has its rearend portion recessed properly to support the head 3, of thel spindlefrom which projectsl forwardlyv the yarn-carrying blade 4l on which isVshown a tight itting cop tube 5.

The heel endl 3 ot the spindle head abuis against a. shell'l or ledge l@formed by cutting out the soli-d ond portion oi th'e slintt'le, whichledge acts as a stop to limit the swingvieiv showing, in plan,

lll

'-" the spindle,

groove y1n the ing movement of the spindle beyond the medial or centralline of the shuttle under the pressure of the coil spring 7 and theinserted plunger G, which engages a usual transverse socket formed inthehead 3 of the spindle. This is an old and well known constructionformingno part of the present invention, and any other suitable constructionfor normally positioning the spindle in central alignn'ient may beequally well employed..`

The transverse pin end of the shuttle body, forms a pivotal axis aboutwhichthe spindle can be swung between the limits of its n'iovement.

The bobbin-grippin and retaining memu bei' 9v formed, with parallelupturned spaced ears 9a mounted on the pivotal axis 2 astride of theblock or head portion 3, of but is loose both with relation to thespindle and to the axis 2, so as to allow it to have a certainindependence of movement with relation both to the pivoted spindle andto the spring arm 8 which forms the bol)bin-retaining member.

rl`he bobbin-retaining member 9 has an inwardly turned fork or notchedhool. 91 to permit it to form contact around the outer surface of thecoptube which, innormal operative position, it grips tightly against theinterior spindle blade 4. is inserted transversely of the shuttle bodyin the space between the bobbin-gripping member 9 and the forward end ofthe head portion 3 of the spindle so that, when the spindle is swungoutwardly .to open position, it will form a stop to engage the meinber9- and arrest its pivotal movement, while allowing further outwardmovement ofthe spindle to continue, thereby separating thespindle-supported cop tube from the forward gripping portion 9b of thecop-grip-` ping member so as to entirely release the retainingengagement therewith and allow the cop tube to be easily withdrawn andanother cop tube inserted in its place.

rfhe bobbina'etaining arm 8 may be made of fairly heavy spring steel andat its rear end is riveted or otherwise firmly secured to the heel 3 ofthe spindle in such relation as to normally exert an upward pressureagainst the underside of the bobbin-gripping member 9 to press the sameinto gripping engagement with the adjacent end of the cop-tube. Theforward end of the bobbinretaining member is turned inwardly to form aninteriorly grooved fork or hook 8a, adapted to pass into. a usual.peripheral u base of an ordinary bobbin. rlhe position of such a bobbinis indicated y in outline by dotted lines in ljigure-.l

It will be observed that the members S and 9 are so related, when thespindle is in operative position for weaving, that the spring arm S isslightly pressed away from 2, mounted in this rear A stop pin l0* `g thestraight line to exert an 'upward thrust against the pivotal grippingmember somewhat forwardly of the axial center of the latter with the twomembersA extending in substantial parallelism. This pressure in front ofthe pivotal axis not only pinches the gripping porti-on 9b tightly.against the cop tube, when the parts are in operative position, but alsotends to cause the loosely mounted member E) to swing about its axiswhen the spindlevb-ladey is swung to open position, until the member 9comes into contact with the stop pin i0, at which position furthermovement of the cop-gripping member is positively prevented. The furtherswinging movement of the spindle, carrying. with it the attached springarm' 8, causes the spring arm to assume an angular relationship to themember 9 with the point of contact or thrust of said spring arm againstthe member 9 advancing around the curved front end portion of thecop-grip ping member. y y i,

By thisr arrangement and action the point of resistance to the continuedrevolution of the spring arm 8 isshifted well toward the forward end ofsaid arm, with the conse quenee that said pressure or stop action isapplied at an increased `distance from the point of attachment, therebypermitting the reater part of the length of the spring arm 8 toparticipate in the flexing action caused by the further outward swing ofthe spindle. This long leverage eases the strain on the spring arm, andat the same time giving greater resiliance with the result that aheavier spring arm 8 may be used without increasing the resistance toLopening the spindle. As the cop-gripping or retaining member need notbe made of spring metal at all, as it requires no flexing to properlyperform its function, it will be seen that both the retaining membersmay be made of very strong and durable c mstruction so as to avoid thebreak-age of these parts which is a common occurrence in otherconstructions used for this purpose.

Vilhat I claim is:

1.111 a weaving shuttle, of a shuttle body, a cop and bobbin spindlepivotally mounted in the rear end of the shuttle to swing outwardly forthe removal of cop or bobbin, a spring arm secured to the heel end ofthe spindle and having its forward end inwardly turned to engage `andretain a bobbin, a pivoted cop-retaining member loosely mounted on thepivotal axis of the spindle and provided with an inturned cop-engagingportion at its forward end to'engage and retain a cop tnbeon theAspindle blade, said cop retaining member beingv disposedkto be pressedinto engagement with a blade-carried cop when the parts are in properposition for weaving and to itself form a stop abutting against thecombination said spring arm when the spindle is swung out for removal ofcop tube or bobbin, substantially as described.

2. In a weaving shuttle, the combination ot a shuttle body, a pivotedspindle mounted upon a transverse pivot pin in the rear end portion ofthe shuttle, a spring arm formed at its forward end to form retainingengagement with a bobbin carried by the spindle, and secured at its rearend to the rear or heel end of the spindle, a cop-engaging and retainingmember loosely mounted on the pivoted pin to permit rocking movement, astop member arranged between the spindle blade and the cop-engagingmember to limit the pivotal movement of the latter, the spring arm beingarranged to rock the forward end of the cop-engaging member intoengagement with the cop when the spindle is in normal weaving positionand to be engaged and arrested by the forward end of the cop-engagingmember when the spindle is swung out of the shuttle, substantially asdescribed.

3. In a weaving shuttle, the combination with a shuttle body, of a bladepivotally mounted near its rear end on a transverse axis in the rearpart of the shuttle, copgripping and bobbin-retaining members mountedrespectively on the said pivotal axis and on the heel end of the spindleso that, as the spindle is swung out of the shuttle, the relation ofsaid members changes from a parallel to an angular relation, and a stoparranged to limit movement of the copgripping member about its axis andby engagement of the forward end of said copgripping member with thespindle-supported member preventing the latter from swinging furtherwith the outwardly moving spindle, substantially as described.

4. In a weaving shuttle, the combination with a. shuttle body, a spindlemounted to swing upon a transverse pivot pin located in the rear portionof the shuttle body, an

independently mounted pivoted cop-engaging member, a stop for limitingthe outward swing of the cop-engaging member before the spindle hascompleted its outward swing, a spring arm secured to the heel end et thespindle to normally press the cop-engaging member against a Acop on thespindle, substantially as described.

5. In a weaving shuttle, the combination with a shuttle body, a spindlepivotally mounted on a transverse pivot pin located in the rear portionof the shuttle, a spring arm secured at its rear end to the heel end ofthe spindle and terminating at its forward end in an inwardly turnedbobbinretaining member, an intermediate arm between the spring arm andthe spindle pivotally mounted on said pivot pin to permit a limitedswinging movement with the outwardly swinging spindle, until engaged bya stop, said pivoted arm acting to resist the pressure of the spring armtoward the pivotal axis when the spindle is in normal weaving' positionand to limit the movement of the forward end of said spring arm with theoutwardly swinging spindle by pressure applied to said arm near itsforward end, substantially as described.

6. In a weaving shuttle, the combination of a shuttle spindle providedwith a transverse pivot pin, a bobbin-retaining spring arm secured tothe heel end of the spindle in substantial parallelism with the spindleaxis, an intermediate arm pivotally mounted on the pivot pin to swingwith the spindle until engaged by a stop, said intermediate arm forminga resisting contact with the spring arm at all times, the point of suchcontact shifting towardA the forward end of the spring arm as thespindle blade is swung to open position, substantially as described.

In witness whereof, I have subscribed the above specification.

GEORGE A. LITonrmLD,

